Gear or wheel puller



Feb. 2Q, 1923.,

n; R. CAPES.-

GEAR 0R WHEEL PULLER.v FILED MAY31.1921.

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` i `thenstrilre the tool with a sledge in order to affords a bearing surface which will abut i 3o lt is an object of this invention to devise provided with two lugs 9 anda boltl() is wheel puller, partly in section. i face of which the screw 12, which constitutes y on i ft `nnrnmvr n. caries, or cnroaeo, irmnors.

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application sie@ ria-f ai, ieri. serial no. trasse.

To all whom it may concern.' y Un the drawings: f y y lle it known that l, Disminuir E. Cares, a The wheel 1 and its axle 2 are of a type citizen of the United States, and a resident frequently found in automobiles; ln order of the city of Chicago, in the county'of Cook to separate the wheel 1 from the axle 2 it is and State oflllinois, have invented certain` necessarythatthe wheeland the` parts of the new and useful linprovements in a (lear or bearing Connected therewith shall be moved 6o `Wheel Puller; and l dohereby declare that to the left while the axle 2 remains stationthe following is a full, clear, and exactde` ary. lhe hub 3 of the wheel is provided scription of the same, reference being had with the usual. threads a, which are ordiio to the accompanying drawings, and to the nai-ily employed to hold the cap covering the numerals of reference l marked thereon, end of the bearing. ln the form of my in- 6a which form a part of this specification. .ention which. l have chosen forillustration, When `it necessary for repairs or any the outer member of the tool is secured to other purpose to separate a wheel from its the wheel by being screwed upon these 15 axle, it sometimes occurs that difficulty is threads, but the invention is not limited t0 encountered because the two parts are stuck a tool provided with such threads and it together. 'llools have been devised forsepamay be used in connection with other types rating the parts. Such tools usually consist, of wheel than that illustrated. of a male member that presses against the` Vlhe outer member of my tool is in the 20 axle and a female memberfthat pulls upon forni of a hollow bearing neck as shown at l the wheel. `lt is the habit of the workman and is preferably bell-shapedn The mouth, using such tool to screw the male member of the bell is provided with threads which as tightly as possible against the axle and lit the threaded. Theedge of the mouth 25 jar the wheel and the axle. ln this way the against the shoulder 7 upon the hub `and threads between the male and female memy limit the extent to which the outer portion bersvery quickly become battered and the can be screwed uponv the wheel. ln` order usefulness ofthe tool is terminated or lessthat the threads may lit easily, the bell is oued, split-as shown4 at S. The rim of the bell is a tool of this class which will avoid this dif. threaded in one of these lugs and passes `85` iculty. y d loosely through the other in order that it lt is a further object of thisinvention to may draw the lugs together'. When the devise a gear or wheel puller that shall have outer member has been screwed upon the between its external and internal members threads d until the rim 6 abuts against the a sleeve threadedupon oneand slidable upon shoulder 7, the lbolt 10 is tightened in order 90 the other member, so that when the tool is that the threads may grip one another fast struck to j ar the wheel and axlethe shock of and relative motion between the outer meinA the blow shall produce a sliding action beber and the hub will be effectually prevent 4o tween the sleeve and its housing instead of ed. The inner member is not secured to the producing a strain upon the threads, d axle but bears against it in order that it Other and further important objects of may exert a thrust thereon. d

this invention will be apparent from the disln the application of the tool illustrated,

closures in the drawing and specification. the shaft or axle 2 does not extend beyond l5 The invention (in a preferred form) is the outer edge ofthe sleeve 15 which surillustrated in the drawings and hereinafter rounds it and must move with it. Said more fully described. o sleeve, as well as the axle, should receive the Fig. 1 is a sectional view through a part thrust. 'lo adapt the tool to this situation, a of a wheel showing the application of my `filler block 411 is provided, against the outer d Fig. 2 is a front elevationof the wheel the inner member, abuts. The filler block 105 puller in detached position; has a face 13, which bears against the end of Fig. 3 is a section on .the line `3*3 of the shaft 2. and a shoulder 14 which bears Fig. 1. l against the outer edge of the sleeve 15.

Thus a thrust received by the screw 12 is transmitted alike to the sleeve 15 and the axle 2.

Threaded upon the screw 12 is a sleeve 16 which fits easily in the central part'of the outer member 5. The inner end of this sleeve has a ange 17 which bears against the shoulder 18 formed by the interior surface of. the bell. At one point, as shown at 19, the flange is cut away to afford a. flat surface which cooperates with a fiat surface on a lug 20 on the inside of the bell to prevent the sleeve 16 from rotating. The outer end of the screw 12 has a head. 21 furnished with the usual laterall faces for the application of a wrench. The top 22 of this head is available to receive the blows of a hammer.

ln the operation of this tool when a wheel is to be removed from its axle the outer member 5 is first screwed upon the hub by means of the threads e. When it has been screwed 'completely home the bolt 10v is tightened until all further possibility of relative motion between the member 5 and the hub 3 is prevented. applied to the head 21 and the screw 12 is turned until it bears against the end` of the shaft 2 or the outer surface of the block 11. Any further application of the wrench to the head 21 will result in pressure of the screw 12" against the shaft 2 or against the block 11 and also in pressure of the flange 17 against theshoulder 18. 1f the wheel is not stuck'to the axle, the turning of the head- 21f under these conditions will pull the wheel 1 toward the right in Figure 1 and effect a separation of the wheel and axle. 1f the wheel is stuck on the axle, such a turning of the head 21 will only tighten the parts increasing the bearing` of the screw 12 against the surface of theshaft 2 or block 11 Aandthe pressure of the flange 17' against the shoulder 18. The latter thrust is transmitted in the form. of a pull against the hub.

When the head 21 has been turned until these forces are as vlarge as the workman thinks they may safely be made and the wheel has not started to pull away from the axle7 he strikes the surface 22 with a hammer. The iar of this blow is conimunicated to the shaft'2 by being` transmitted through the length of the screw 12, but there is no strain induced thereby between the threads of the screw and the interior lthreads of the sleeve 16 because any motion of the screw is accompanied readily by a motion of the sleeve as the sleeve is slidable in the outer member 5. The outer member 5 and the wheel do not receive directly any motion from `this blow, but their inertia tends to cause the sticking surfaces to separate when the jar from the blow is communicated to the axle 2. k

If the adhesion between the sticking surr1 wrench is then` faces is too great for them to separate under the effect of this blow. no bruising olI the threads l will result because these threads have been tightened upon the hub until all relative motion between the parts S and 3 is impossible. These threads will not be strained for the additional reason that the freedom of the sleeve Y16 to slide in the part 5 prevents any force of the blow from coniing directly to these threads. lt can reach them only by being transmitted through the axle, hrough whatever makes the axle stick to the wheel, and then through tlu` wheel. r1`he inertia of the wheel is large. nonipared to the inertia of the part Consequently no great strain can be put on the threads Li. 'iheseparation oi the tool into two parts. one of which receives the thrust directly and the other only through the sticking surfaces greatly increases the client of the blow because no tendency of the blow to n'iove the wheel toward the right in Fieure 1 directly transmitted.

It will be evident that the application of this invention is not limited to the particular forni of wheel illustrated with the threaded hub. l,When it is applied to other wheels, as for example in removing a geo r wheel from its shaft7 other fastening means may be used instead of the threzuls It. such fastening means are already known lo workers in this art. I do not illustrate or describe them. The tool is equally appli cable tothe removal of a casting l'roni :i mandrel or to any other situation in which a part surrounding a sl aft or au :mln is likely to require considerable torre lor iisl removal.

I am aware that numerous details ol construction niay be varied through a wide range without departing from the prin ciples of this invention. and l linereiore do not purpose limiting the patent granted otherwise than necessitated by the prior arl.

I claim as my invention:

wheel puller comprising a bell-shapnd member having` an internally threaded mouth and an outer hollow bearing neck. :i sleeve slidahly mounted in said neck and extending therethrough, the inner end ol' said sleeve having a radial flange bini-ing." against the inner surface of said bearingF neck, said iiange and bearing neck havingl cooperating flat portions for preventingr relative rotation thereof. and a javi: :www extending through said slecv und in screw threaded engagement therewith.

In testimony whereof l have hereunto subscribed iny naine in the presence of tuo subscribing witnesses.

DELBERT R. Cr PICS.

`Witnesses l EARL M. HAnniNr. JAMES M. OBRiuN. 

